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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Radiator

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Old Feb 13, 2015 | 10:09 AM
  #1  
Softballdad's Avatar
Softballdad
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Mountain Pass
Joined: Mar 2008
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From: Chesapeake, Va
Radiator

On Monday with 108k on my truck I had the leaking radiator, pulley, and tensioner replaced under warranty. The only cost I had was the upper/lower radiator hoses and belt. They tested the t-stats and said they were fine, so no need to worry about them. Are the t-stats a concern? I don't recall reading there being a problem with them, and wonder if I should have pressed more to have them changed. I'm not getting high temps and the oil and coolant temps are pretty close to each other so maybe there's no concern.
 
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Old Feb 14, 2015 | 11:10 AM
  #2  
fatboytx's Avatar
fatboytx
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Joined: Feb 2015
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You can find youtube videos of bad 6.4L thermostats. I guess they hyperextend and get stuck. I've got a new set to throw in next time I flush the cooling system.
 
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